Some ways to download file names with international (non-asci) characters.
The main problem for file downloads is to set right file name with good international characters. The downloaded file name is specified by a filename parametr of Content-Disposition http header.
There is no problem if you set only ASCII characters for the parametr. you can use
Response.AddHeader "content-disposition", "attachment; filename=anyascicharactersyouwant.txt"
But the problem is when you try to use any non-ascii characters in the downoaded file name. Sometimes you will need some russian file name: ???_?????.txt, sometimes chinese 文件名 ???, japanese ファイル名, korean 파일 이름 or some Cental european filename (Czech) příliš_žlutý_kůň_úpěl_ďábelské_ódy.txt.
I was not able to find universal settings to do this task, but it looks like Mozilla based browsers accepts utf-8 encoded headers and headers Encoded Word Extensions from RFC 2231. Internet explorer accepts utf-8 filenames only when 1. the data are URL encoded and 2. the extension of the file contains only ASCII characters.
Sub SetContentDisposition(byval FileName) 'set response. charset Response.CharSet = "utf-8" 'set ContentType - download Response.ContentType = "application/download" 'URLEncode the filename for IE If Instr(1, Request.ServerVariables("HTTP_USER_AGENT"), "MSIE", 1)>0 Then FileName = URLEncode(FileName,"utf-8") End If 'Add a Content-Disposition header with the filename Response.AddHeader "Content-Disposition", _ "attachment; filename=""" & FileName & """" End Sub 'URL Encode with character set Function URLEncode(ByVal Data, CharSet) Dim ByteArray Set ByteArray = CreateObject("ScriptUtils.ByteArray") ByteArray.CharSet = CharSet ByteArray.String = Data If Len(Data) > 0 Then Dim I, C, Out For I = 1 To ByteArray.Length C = ByteArray(I)'Asc(Mid(Data, I, 1)) If C = 32 Then Out = Out + "+" ElseIf C < 46 Or c>126 Then Out = Out + "%" + Hex(C) Else Out = Out + Chr(c) End If Next URLEncode = Out End If End Function
Works with safearray binary data - save/restore binary data from/to a disk, convert to a string/hexstring, codepage/charset conversions, Base64 conversion, etc.
ByteArray is a COM class specially designed to work with Microsoft Windows Scripting engines - VB Script and JScript in Active Server Pages or WSH and in CHM or HTA applications. It also works with VB Net, Visual basic (VBA - VB 5, VB 6, Word, Excel, Access, …), C#, J#, C++, ASP, ASP.Net, Delphi and with T-SQL OLE functions - see Use ByteArray object article. You can also use the object in other programming environments with COM support, such is PowerBuilder.
Source code for ByteArray is available within distribution license, please see License page for ASP file upload and ScriptUtilities.
Huge ASP upload is easy to use, hi-performance ASP file upload component with progress bar indicator. This component lets you upload multiple files with size up to 4GB to a disk or a database along with another form fields. Huge ASP file upload is a most featured upload component on a market with competitive price and a great performance . The software has also a free version of asp upload with progress, called Pure asp upload , written in plain VBS, without components (so you do not need to install anything on server). This installation package contains also ScriptUtilities library. Script Utilities lets you create hi-performance log files , works with binary data , you can download multiple files with zip/arj compression, work with INI files and much more with the ASP utility.
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